Exclude 'images/misc' directory from file collection (#96)

Updates the unreferenced_images workflow to skip the 'misc' directory under 'images' when collecting files. This prevents files in 'images/misc' from being processed.

.github/workflows/unreferenced_images.yml

@@ -54,6 +54,7 @@ jobs:
               }
               for (const entry of entries) {
                 if (entry.name === '.git') continue;
+                if (relativeDir === 'images' && entry.isDirectory() && entry.name === 'misc') continue;
                 const rel = relativeDir ? `${relativeDir}/${entry.name}` : entry.name;
                 if (entry.isDirectory()) {
                   files.push(...collectFilesUnder(rel, extSet));